Easy to install inline plug module progressively increases mainline pressure giving smooth engagements with lower load on the pump at idle. Achieves shorter shifts and increased torque capacity without creating low-speed harshness and improves clutch holding capacity for increased durability. Delivers 10 psi increase at lower pressure range and 25 psi increase at higher pressure ranges, and, advance control integrated chip eliminates the occasional error code caused by resistor based devices.